Přehled použitelnosti skel na FF dle
http://www.pentaxforums.com/forums/pent ... hread.html
SMC Pentax-DA primes...
DA 14mm F2.8: - (clawhammer)
DA 15mm F4.0: - (Zav)
DA 21mm F3.2 Limited: - (Boris Liberman)
DA 35mm F2.4 AL: +++ (aurele ;like FA35/2.0 and no vignetting) (frank)
DA 35mm F2.8 Limited Macro: 0 (ryno), + (@ 1.15 crop)
DA 40mm F2.8 Limited: +
DA* 55mm F1.4 SDM: missing (no vignetting at f/8)
DA 70mm F2.4 Limited: +
D FA Macro 100mm F2.8 WR: +++ (officially specified FF by Pentax)
DA* 200mm F2.8 ED [IF] SDM: +++? (common belief, but is it true?)
DA* 300mm F4 ED [IF] SDM: ++ (officially rated "designed for FF" by Pentax patent US7715116)
SMC Pentax-DA zooms...
DA 10-17mm F3.5-4.5 Fish-Eye ED [IF]: FE, see #59, #61, #94. 10mm: heavy vignette / 14mm: almost no vignette / 17mm ++ (Reps, froeschle, Gooshin)
DA 12-24mm F4 ED AL [IF]: - (below 16mm, xitek.com), o (at 18mm, architorture), + (at 20mm, architorture), ++ (at 24mm, architorture)
DA 16-45mm F4: - (below 21mm, Nesster)
DA* 16-50mm F2.8 ED AL [IF] SDM: - (xitek.com)
DA 17-70mm F4 AL [IF] SDM: - (KjetilH)
DA 18-55mm F3.5-5.6 AL: - (at 18mm, Spongefingers; below 23mm, xitek.com)
DA 18-55mm F3.5-5.6 AL II: missing
DA 18-250mm F3.5-6.3 ED AL [IF]: - (xitek.com)
DA 50-200mm ED: -
DA* 50-135mm F2.8 ED [IF] SDM: - (elho_cid)
DA* 60-250mm F4 ED [IF] SDM: ++ (officially rated "designed for FF" by Pentax patent US7489452) probably good on full frame but evaluation still missing; ++ is a temorary rating)
DA 55-300mm F4-5.8 ED: + / ++ (+, ++ at tele end, viking79)
Sigma K mount DC...
Sigma 18-200mm f/3.5-6.3 DC: -
Sigma 10-20mm f/4-5.6 DC: - (below 14mm, Gooshin)
...
Tamron K mount Di-II...
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Overall rating scale:
+++: no significant difference between APS-C and FF corners
++: difference but usable at full aperture with a small loss in corner IQ only
+: usable staring at f/4~f/5.6, with no or a small loss in corner IQ only
o: usable at f/11 or with big loss in corner IQ only
-: not usable